a new dilemma for the united states in the war on al-qaeda. the radical imam linked to the christmas day airline bombing attempt happens to be an american citizen. he's also been tied to the fort hood massacre in one way or another, and two 9-11 hijackers. now fox news has learned that the united states has targeted him with at least one air strike. at the same time, it's putting the confessed 9-11 mastermind who is not a citizen, on trial. katherine was the top story at the bottom of the hour live in washington tonight. >> reporter: the operation targeting the american cleric is one the white house is reluctant to discuss publicly. >> complicated by intelligence matters. >> reporter: it is also complicated by the fact that as the u.s. targets or backs strikes on a limited number of its own citizens overseas, the 9-11 conspirators are being afforded the full constitutional rights of an american citizen in the federal courts. which include the presumption of innocence. >> granting someone like khalid shaikh mohammed the 9-11 master mind the ful